Conclusion–
We have introduced a platform with non-reciprocal and quantum transport of light, based on hot-atom vapor cell in a spin-coherence-protected environment. Both the observed non-reciprocal transport and quantum correlations between the optical channels derive from the interference mediated by an engineered reservoir, and are tunable by adjusting parameters of all the optical channels including the one embedded in the reservoir. Our work provides a prototype configuration for an atom-based, non-reciprocal optical element. Based on the geometry of our setup and benefiting from the high degree of control over the atom-light interactions, the configuration demonstrated here may further offer opportunities for quantum simulation in open systems [1]}, [2]} using multiple coupled optical channels.
